Dynamics: Practice #2 Kinematics & Kinetics of Rigid Bodies
R. Gist (Sum. ’06)
1 of 2
Ver. B, Rev. 2
1.
Determine the acceleration of the cylinder.
The tension in the rope is 12 N.
The
cylinder has a mass of 4 kg, and a radius of 0.02 m.
Assume the cylinder does not
slip as it rolls.
2.
At the instant shown, the 20lb bar is rotating downwards at
2 rad/s.
The spring attached to its end always remains
vertical due to the roller guide at
C
.
If the spring has an
unstretched length of 4 ft and a stiffness of
k
=3 lb/ft,
determine the angular velocity of the bar the instant it has
rotated downward 30 degrees below the horizontal.
3.
A thin rod of mass 2kg and length
l
=1.5 m has an angular
velocity
ω
0
= 4 rad/s while rotating on a smooth surface.
Determine its new angular velocity just after its end
strikes and hooks onto the peg and the rod starts to rotate
about
P
without rebounding.
4.
At a given instant, the slider block
B
is traveling to the right
with the velocity and acceleration shown.
Determine the
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 Spring '09
 BillS
 Angular Momentum, Rotation, Velocity, Elevator

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